<template>
    <div class="login">
      <van-nav-bar title="会员登录" left-arrow @click-left="$router.back()" />
      <div class="container">
        <div class="title">
          <h3>手机号登录</h3>
          <p>未注册的手机号登录后将自动注册</p>
        </div>

        <div class="form">
          <div class="form-item">
            <input class="inp" maxlength="11" placeholder="请输入手机号码" type="text" v-model="mobile">
          </div>
          <div class="form-item">
            <input class="inp" maxlength="5" placeholder="请输入图形验证码" type="text" v-model="picCode">
            <img v-if="pic" :src="pic" alt="" @click="getPicture">
          </div>
          <div class="form-item">
            <input class="inp" placeholder="请输入短信验证码" type="text" @click="checkInput" v-model="msgCode">
            <button @click="getCode">{{ second===totalSecond?'获取验证码': second+'秒后重新发送' }}</button>
          </div>
        </div>
        <div class="login-btn" @click="loginBtn">登录</div>
      </div>
    </div>
  </template>

<script>
import { getPicture, getMsgCode, codeLogin } from '@/api/login'
import { Toast } from 'vant'
export default {
  data () {
    return {
      pic: '',
      picKey: '',
      mobile: '',
      captchaCode: '',
      picCode: '',
      msgCode: '',
      totalSecond: 60, // 总秒数
      second: 60, // 倒计时的秒数
      timer: null // 定时器 id
    }
  },
  name: 'LoginPage',
  methods: {
    async getPicture () {
      const { data: { base64, key } } = await getPicture('/captcha/image')
      this.pic = base64
      this.picKey = key
    },
    prompt (msg) {
      Toast(msg)
    },
    validCheck () {
      if (!/^1[3-9]\d{9}$/.test(this.mobile)) {
        this.prompt('请输入正确的手机号')
        return false
      }
      if (!/^\w{4}$/.test(this.picCode)) {
        this.prompt('请输入正确的图形验证码')
        return false
      }
      return true
    },
    checkInput () {
      if (!this.picCode) {
        this.prompt('请输入图形验证码')
      }
    },
    async getCode () {
      if (!this.validCheck()) return
      if (!this.timer && this.second === this.totalSecond) {
        // 开启倒计时
        this.timer = setInterval(() => {
          this.second--

          if (this.second < 1) {
            clearInterval(this.timer)
            this.timer = null
            this.second = this.totalSecond
          }
        }, 1000)
        const res = getMsgCode(this.picCode, this.picKey, this.mobile)
        console.log(res)
        // 发送请求，获取验证码
        this.$toast('发送成功，请注意查收')
      } else {
        this.prompt('请稍等')
      }
    },
    async loginBtn () {
      if (!this.validCheck()) {
        return
      }
      if (!/^\d{6}$/.test(this.msgCode)) {
        this.$toast('请输入正确的手机验证码')
        return
      }
      const res = await codeLogin(this.mobile, this.msgCode)
      console.log(res)
      this.$router.push('/')
      this.$toast('登录成功')
    }
  },
  async created () {
    this.getPicture()
  },
  // 离开页面销毁定时器
  destroyed () {
    clearInterval(this.timer)
  }
}
</script>

  <style lang="less" scoped>
  .container {
    padding: 49px 29px;

    .title {
      margin-bottom: 20px;
      h3 {
        font-size: 26px;
        font-weight: normal;
      }
      p {
        line-height: 40px;
        font-size: 14px;
        color: #b8b8b8;
      }
    }

    .form-item {
      border-bottom: 1px solid #f3f1f2;
      padding: 8px;
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      .inp {
        display: block;
        border: none;
        outline: none;
        height: 32px;
        font-size: 14px;
        flex: 1;
      }
      img {
        width: 94px;
        height: 31px;
      }
      button {
        height: 31px;
        border: none;
        font-size: 13px;
        color: #cea26a;
        background-color: transparent;
        padding-right: 9px;
      }
    }

    .login-btn {
      width: 100%;
      height: 42px;
      margin-top: 39px;
      background: linear-gradient(90deg,#ecb53c,#ff9211);
      color: #fff;
      border-radius: 39px;
      box-shadow: 0 10px 20px 0 rgba(0,0,0,.1);
      letter-spacing: 2px;
      display: flex;
      justify-content: center;
      align-items: center;
    }
  }
  </style>
